42 Development of machining and welding techniques; scientific and technological services, namely, research and development in the field of machining and welding; Industrial analysis and research services in the field of metal machining and welding; design and development of computer hardware and software; research, design, consultancy and development and advisory services relating to materials joining technology; research, design, consultancy and development and advisory services relating to avoiding and correcting distortions in welding, radiography of welding and metallurgy in welding, welding of carbon manganese steels, technology, welding, joining, manufacturing technologies, fabrication technologies and repair technologies; design of manufacturing methods; engineering consultancy relating to manufacture; technological services, namely, scientific research, analysis, testing relating to solid state processing and machining relating to manufacture; quality control of manufactured goods; engineering project management services; examination of welded fabrications to determine properties, soundness and structure for quality control purposes; analysis of the structural behaviour of buildings and building materials; structural engineering services; engineering consultancy; technical consultancy services relating to structural engineering; consultancy services relating to the testing of materials; engineering consultancy relating to materials; materials evaluation and testing; inspection of fabricated structures for quality control purposes; advisory services relating to material testing; design of equipment for joining, cutting and inspection applications; material testing; information, advisory and consultancy services in relation to all the aforesaid services